Merge pull request #178 from pedroigor/master

[PLINK-231] - AbstractIDPValve class doesn't clean Response before POST ...
Merge pull request #179 from pedroigor/master

[PLINK-232] - JDBC Token and Revocation Registry.
Merge pull request #180 from pedroigor/master

[PLINK-233] - SP should read/recognize the SingleLogoutLocation Response...
Merge pull request #181 from pedroigor/master

[PLINK-234] - Optional Attribute in Validation Calls to PicketLink STS.
Merge pull request #182 from pedroigor/master

[PLINK-235] - Invalid Logout Responses from SAML2LogoutHandler.